<template>
  <el-container class="home-container">
    <!-- 头部区-->
    <el-header>
      <div>
        <img src="../assets/heima.png" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>

    <el-container>
      <!-- 侧边栏区-->
      <el-aside :width="isCollapse ? '64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>

        <!-- 侧边栏菜单区-->
        <el-menu
          unique-opened background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
          >
          <!-- 一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <!-- 一级菜单的模板区域-->
            <template slot="title">
              <!-- 图标-->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本-->
              <span class="iconfont">{{item.authName}}</span>
            </template>
            <!-- 二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
              @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标-->
                <i class="el-icon-menu"></i>
                <!-- 文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>

        </el-menu>
      </el-aside>
      <!-- 主题区域-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    data() {
      return {
        //左侧菜单数据
        menuList:[],
        iconsObj:{
          '125':'iconfont icon-user',
          '103':'iconfont icon-tijikongjian',
          '101':'iconfont icon-shangpin',
          '102':'iconfont icon-danju',
          '145':'iconfont icon-lock_fill'
        },
        isCollapse: false,
        //被激活的链接地址
        activePath:''
      }
    },
    created() {
      this.getMenuList();
      this.activePath = window.sessionStorage.getItem("activePath");
    },
    methods: {
      logout() {
        window.sessionStorage.clear();
        this.$router.push("/login")
      },
      //获取所有的菜单
      async getMenuList() {
        const {data:res} = await this.$http.get("menus");
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        this.menuList = res.data;
      },
      //点击按钮，切换菜单折叠与展开
      toggleCollapse() {
        this.isCollapse = !this.isCollapse;
      },
      //保存链接的激活状态
      saveNavState(activePath){
        window.sessionStorage.setItem("activePath",activePath);
        this.activePath = activePath;
      }
      
    }
  }
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #FFF1F0;
    font-size: 20px;

    >div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
  }

  .el-main {
    background-color: #eaedf1;
  }
  .iconfont{
    margin-left: 15px;
  }
  .toggle-button {
    background-color: #4a5064;
    color: white;
    font-size: 10px;
    line-height: 24px;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
